John gifford



J. GIFFORD.

GHURN.

(No Model.)

No. 482,032. Patented July 15', 1890.

FIEJ- INVENTEIR r X? UNITED STATES PATENT OFFICE.

JOHN GIFFORD, OF IVATERTOIVN, NEIV YORK, ASSIGNOR TO THE GIFFORDMANUFACTURING COMPANY, OFSAME PLACE.

CHURN.

SPECIFICATION forming part of Letters Patent No. 432,032, dated July 15,1890.

Application filed m 21, 1338. Serial No. 280,643. (No model.)

T0 at whom it may concern.-

Be it known that I, JOHN GIFFORD, of Vatertown, in the county ofJefferson and State of New York, have invented a new and usefulImprovement in Ghurns, which improvement is fully set forth in thefollowing specification.

This invention relates to the construction of churns, particularly tochurns intended for use in creameries to be driven by power. Such churnsare commonly constructed with a rectangular body hung in bearings andadapted to revolve, the cream being dashed from side to side, and thebutter thus formed without the use of paddles or dashers. A churn ofthis kind is described in my Patent No. 257,570, dated March 9, 1882'.Such churns, when driven by power, are usually provided with a pulley onthe end of the shaft carrying the churn. This construction requires theapplication of a great deal of power to rotate the churn,for the reasonthat the friction is largelyon one of the bearings, and the weight ofthe churn itself, with its shifting contents, (weighing, say, upward ofthree hundred pounds,) causes it to run unevenly and with considerablejar or concussion.

According to the present invention a pulley is formed in the middle ofthe churn-body, preferably by means of segmental-shaped lugs boltedthereto, so that the power is applied midway between the bearings of thechurn and the latter can be driven with much less power and runs moreevenly and smoothly than was heretofore the case. Moreover, by thisconstruction the power is advantageously utilized, as the large size ofthe pulley gives leverage correspondingly great. The invention alsoincludes certain details of construction in connection with theventpipe, as hereinafter set forth.

In the accompanying drawings, which form part of this specification,Figure 1. is a perspective view of a churn constructed inaccordance withthe invention; Fig. 2,a partial longitudinal section; Fig. 3, a detailof the hood covering the vcntpipe, and Fig. 4 adetail of spring 71. v

A represents the rectangular churn-body preventing leakage at thispoint.

supported on arbors a, which have bearings in frames B. About midwaybetween the two bearings is placed the pulley 0, formed by boltingsegmental-shaped lugs on the four sides-of the churn-body. The vent-tubeb is constructed in some respects like that described in my aforesaidpatent. It consists of a bent or elbow tube having a horizon tal part,which passes through the hollow arbor a, and is held stationary duringthe rotation of the churn by a clasp (Z. It is found, however, thatthere is great difficulty in keeping the tube open, as particlesof creamlodge in the openings and soon clog them up. To obviate this difficulty,I now make the portion of the tubeb inside the churn straight andprovide a hood (2, (of wood, metal, or other suitable material,) whichfits closely over the end of tube 12, but can turn freely thereon. Thishood is closed at the top and has a lateral extensiomin which is a holef, of large diameter, extending up obliquely to meet the centralperforation of the hood and constituting the continuation of thevent-pipe. In operation the cream is thrown over the back of the hoodand runs down the slanting walls thereof; but on reaching the opening f,the latter being of considerable width, it does not close together andstop the opening. The hood is readily removable for cleaning.

Upon the horizontal part of tube 1) inside the churn is a washer g, andto keep this against the inner end of the hollow arbor a a spring 7L isprovided, the shape of which is shown in Fig. i. The looped end h ofthis spring encircles tube 1), while the other ends, which arehook-shaped, as shown, are caught over casting'i just under arbor a. Thespring his thus compressed and pushes back against the pin 70 in tubeb,pressing the tube and washer firmly against the end of arbor a and Forlarge churns there may of course be one vent-tube at each end.

It is obvious that parts of the invention could be used without others,and that modi- 5 fications could be made in details of constructionwithout departing from the spirit of the invention.

I claim as my inventionbor to prevent leakage, substantially as de- 1. Achurn havinga rectangular rotating scribed. body on'a horizontal axisand provided with In testimony whereof I have signed this adriving-pulley midway between its ends, specification in the presence oftwo subscrib- 5 substantially as described. ing witnesses.

2. The combinat-ion,with the rotatin g churn- I i 4 1 body, of thehollow arbor, the vent-tube pass- N GIFFORD ing through said arbor, thepacking-washer \Vitnesses: surrounding said tube, and the spring for 4JAMES A. XVARD,

1o pressing said washer firmly against said ar- PETER A. TARD.

